功能需求，能灵活新增或删除一个dom元素，在此dom元素中还存在能灵活新增、删除的dom元素。实现后功能图如下：

点击新增策略，能新增整个策略dom

实现思路：定义一个数量和一个数组，然后使用循环遍历展示内容，新增或删除时只需要改变定义的数量，然后删除对应数组元素即可。

示例代码实现：

<div v-for="num in addPlan.strategyNum" :key="num" style="width: 88%; margin: 0 auto;">
    <accordion style="display: inline-block; width: 90%;">
        <template slot="header">
            <span style="background: #fff;">策略名称 {{ addPlan.strategyTempData[num - 1].pro_node }} {{ addPlan.strategyTempData[num - 1].plan_time.toLocaleString() }}</span>
        </template>
        <template slot="content">
            <bk-form>
                <bk-form-item 名称 :required="true">
                    <bk-select
                        v-model="addPlan.strategyTempData[num - 1].pro_node"
                        searchable
                        @change="selectProjectNodeHandel(num - 1, addPlan.strategyTempData[num - 1].pro_node)"
                    >
                        <bk-option v-for="option in addPlan.projectNodeData"
                            :key="option.pro_node"
                            :id="option.pro_node"
                            :name="option.pro_node">
                        </bk-option>
                    </bk-select>
                
                </bk-form-item>

                <bk-form-item 选择 :required="true">
                    <bk-radio-group v-model="addPlan.strategyTempData[num - 1].pro_pass_point">
                        <bk-radio :value="true">是</bk-radio>
                        <bk-radio :value="false">否</bk-radio>
                    </bk-radio-group>
                </bk-form-item>

                <bk-form-item 时间 :required="true">
                    <bk-date-picker placement="right" v-model="addPlan.strategyTempData[num - 1].plan_time" :placeholder="$t('order.selectTime')" :type="'datetime'"></bk-date-picker>
                </bk-form-item>

                <bk-form-item>
                    <div style="border: 1px solid #E0E0E3;">
                        
                        <el-row v-for="entryNum in addPlan.strategyTempData[num - 1].entryRedLineNum" :key="entryNum" :gutter="5" style="width: 100%; padding: 5px 5px;">
                            <el-col :span="8">
                                <bk-select
                                    v-model="addPlan.strategyTempData[num - 1].redlines_info.entry[entryNum - 1].key"
                                    searchable
                                    @change="selectEntryRedLineHandel(num - 1, entryNum - 1, addPlan.strategyTempData[num - 1].redlines_info.entry[entryNum - 1].key)"
                                >
                                    <bk-option v-for="option in addPlan.projectRedLineData"
                                        :key="option.key"
                                        :id="option.key"
                                        :name="option.name">
                                    </bk-option>
                                </bk-select>
                            </el-col>
                            <el-col :span="6">
                                <bk-select
                                    v-model="addPlan.strategyTempData[num - 1].redlines_info.entry[entryNum - 1].selectCondition"
                                    searchable
                                >
                                    <bk-option v-for="option in addPlan.strategyTempData[num - 1].redlines_info.entry[entryNum - 1].conditions"
                                        :key="option.key"
                                        :id="option.key"
                                        :name="option.name">
                                    </bk-option>
                                </bk-select>
                            </el-col>
                            <el-col :span="6">
                                <bk-input :clearable="true" v-model="addPlan.strategyTempData[num - 1].redlines_info.entry[entryNum - 1].default_value"></bk-input>
                            </el-col>

                            <el-col :span="4">
                                <bk-button text="true" v-if="addPlan.strategyTempData[num - 1].entryRedLineNum > 1" @click="delEntryRedLineDom(num, entryNum)" :title="$t('order.button.delete')" style="margin-left: 10px;">
                                    <i class="devops-icon icon-delete"></i>
                                </bk-button>

                                <bk-button text="true" v-if="entryNum === addPlan.strategyTempData[num - 1].entryRedLineNum" @click="addEntryRedLineDom(num)" :title="$t('order.button.addFile')" style="margin-left: 10px;">
                                    <i class="devops-icon icon-plus"></i>
                                </bk-button>
                                
                            </el-col>
                        </el-row>
                        
                    </div>
                </bk-form-item>
            </bk-form>
        </template>
    </accordion>
    <bk-button style="display: inline-block;" :text="true" theme="primary" @click="copyStrategyDom(num)">
        {{ $t('order.button.copy') }}
    </bk-button>
    <bk-button style="display: inline-block;" :text="true" theme="warning" @click="delStrategyDom(num)">
        {{ $t('order.button.delete') }}
    </bk-button>
    
</div>



//定义的数据
strategyNum: 1,
strategyTempData: [
    {
        pro_node: '',
        pro_pass_point: false,
        plan_time: '',
        redlines_info: {
            entry: [
                {
                    key: '',
                    name: '',
                    conditions: [],
                    default_value: '',
                    selectCondition: ''
                }
            ],
            exit: [
                {
                    key: '',
                    name: '',
                    conditions: [],
                    default_value: '',
                    selectCondition: ''
                }
            ]
        },
        entryRedLineNum: 1,
        exitRedLineNum: 1
    }
],



//新增策略 
addStrategyDom () {
    const newData = {
        pro_node: '',
        pro_pass_point: false,
        plan_time: '',
        redlines_info: {
            entry: [
                {
                    key: '',
                    name: '',
                    conditions: [],
                    default_value: '',
                    selectCondition: ''
                }
            ],
            exit: [
                {
                    key: '',
                    name: '',
                    conditions: [],
                    default_value: '',
                    selectCondition: ''
                }
            ]
        },
        entryRedLineNum: 1,
        exitRedLineNum: 1
    }

    this.addPlan.strategyTempData.push(newData)
    this.addPlan.strategyNum++
},
//删除策略
delStrategyDom (num) {
    this.addPlan.strategyTempData.splice(num - 1, 1)
    this.addPlan.strategyNum--
},
//复制策略
copyStrategyDom (num) {
    const newData = this.addPlan.strategyTempData[num - 1]
    newData.plan_time = newData.plan_time.toLocaleString()

    this.addPlan.strategyTempData.push(
        JSON.parse(JSON.stringify(newData))
    )
    this.addPlan.strategyNum++
},

//策略dom内部的 dom 新增
delInteriorDom (firstNum, secondNum) {
    this.addPlan.strategyTempData[firstNum - 1].redlines_info.entry.splice(secondNum - 1, 1)
    this.addPlan.strategyTempData[firstNum - 1].entryRedLineNum--
},

addInteriorDom (firstNum) {
    const newData = {
        key: '',
        name: '',
        conditions: [],
        default_value: '',
        selectCondition: ''
    }

    this.addPlan.strategyTempData[firstNum - 1].redlines_info.entry.push(newData)
    this.addPlan.strategyTempData[firstNum - 1].entryRedLineNum++
},